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PepStack

Precision Protocols for Peptides

Master Your Research. Precision in Every Pin.

The ultimate protocol manager for peptides and TRT. Calculate, schedule, and track your stack with medical-grade accuracy.

PepStack app screenshot

FEATURES

Built for serious peptide workflows.

PepStack Reconstitution Calculator showing vial concentration and dose conversion

Smart Calculator

Reconstitute any vial size with confidence. No more messy spreadsheets.

PepStack Cycle Planner mit aktivem Zyklus, Wirkstoffkarte und Fortschrittsanzeige

Cycle Planner

Erstelle komplette Zyklen mit beliebig vielen Wirkstoffen, Protokollen, Dosierungen und Zeiträumen – alles in einer Übersicht mit zusammenfassender Statistik.

PepStack Intake Calendar with scheduled doses and daily view

Precision Scheduler

Get discrete notifications. Never miss a pin, whether it’s ED, EOD, or 5/2.

PepStack timeline showing multiple peptide protocols across weeks in a stacked grid

Timeline View

Visualize your entire cycle across weeks with all compounds in one graphical timeline – see when each protocol starts, tapers off and when serum levels are expected to peak.

Estimated serum level over 6 weeks (Retatrutide · t½ ≈ 6 days)

The Serum Level Visualizer

Visualize Your Science.

See your serum levels in real-time based on peptide half-lives like Retatrutide (t½ ≈ 6 days). Understand how your stack accumulates over time and optimize your timing for maximum receptor saturation.

Explore Premium

Bio-Privacy First

Your Data. Your Research. Period.

Zero-Knowledge Encryption. We don't want your name. Your logs stay on your device and only you can decrypt your cloud backups. Total anonymity for your personal protocols.

Pricing · Transparent & Fair

One simple premium plan

Choose monthly or yearly billing. Same features, no hidden tiers.

Premium · Monthly

Flexibility first. Cancel anytime without losing your data.

$2.99/ month

Billed via App Store / Google Play.

  • Unlimited stacks & cycles
  • Inventory tracking
  • Serum Level Visualizer
  • Encrypted cloud backups
Save ~30%

Premium · Yearly

Commit to your protocol. Roughly 30% cheaper than paying monthly.

$24.99/ year

Equivalent to $2.08/month. Billed annually via App Store / Google Play.

  • Unlimited stacks & cycles
  • Inventory tracking
  • Serum Level Visualizer
  • Encrypted cloud backups